<template>
  <el-container class='home-container'>
    <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="~@/assets/logo.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">返回</el-button>
  </el-header>
  <!-- 页面主体 -->
  <el-container>
      <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <div class="toggle_button" @click="toggleCollapse">|||</div>
      <!-- 侧边栏菜单组件 -->
      <el-menu
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#33ffff"
      :unique-opened = 'true'
      :collapse = 'isCollapse'
      :collapse-transition = 'false'
      :router= 'true'
      :default-active= 'activePath'
      >
      <!-- 一级菜单 -->
      <el-submenu v-bind:index='item.id + " "' v-for="item in menuList" v-bind:key='item.id'>
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i v-bind:class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index=" '/' + subItem.path + '' " v-for="subItem in item.children" :key="subItem.id" @click="saveNavState( '/' + subItem.path + '')">
          <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
          </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
// 退出登录 清空 token 重新指向 login
export default {
  data() {
    return {
      menuList: [],
      iconsObj: {
        125: 'iconfont icon-UserSettings',
        103: 'iconfont icon-volumemeasurement',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-danju'

      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        return this.$message.console.error(res.meta.msg)
      }
      this.menuList = res.data
      console.log(res)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header {
    background: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0px;
    align-items: center;
    color: #fff;
    font-size: 18px;
    > div{
      display: flex;
      align-items: center;
      padding-left: 10px;
      img{
      width: 63px;
      height: 58px;
    }
      span{
        padding-left: 24px;
      }
    }
    .el-button{
      height: 45px;
    }
}
.el-aside {
    background: #333744;
    .el-menu {
      border-right: none;
    }
}
.el-main {
    background: rgb(206, 199, 199);
}
.iconfont {
  margin-right: 10px;
}
.toggle_button {
  color: #fff;
  text-align: center;
  line-height: 24px;
  font-size: 18px;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
